带反应的 Dragula - 未捕获的类型错误：react_dragula_1.default 不是函数

Question

我正在尝试通过对拖放和查找问题的反应来测试 Dragula。我收到错误：

未捕获的类型错误：react_dragula_1.default 不是函数

任何人都遇到过这个问题或解决问题的线索。

import * as React from "react";
import * as ReactDOM from 'react-dom';
import Dragula from 'react-dragula';

export class MultiPicklist extends React.Component {
    render() {
        return (<div className="swish-input-textarea">
                <div className='parent'>
                    <div className='wrapper'>
                        <div id='left-defaults' className='container' ref={this.dragulaDecorator} >
                            <div>Element 0</div>
                            <div>Element 1</div>
                            <div>Element 2</div>
                            <div>Element 3</div>
                        </div>
                        <div id='right-defaults' className='container'>
                            <div>Element a</div>
                            <div>Element b</div>
                            <div>Element c</div>
                            <div>Element d</div>
                            <div>Element e</div>
                        </div>
                    </div>
                </div>
                </div>);
    },
        dragulaDecorator = (componentBackingInstance) => {
            if (componentBackingInstance) {
                let options = { };
                console.log('componentBackingInstance');
                console.log(componentBackingInstance);
                Dragula([componentBackingInstance]);
             }
  };    

}

Answer 1

我看到你对 ES6 类语法有点混乱。尝试将 ref 回调拉到类定义之外：

import * as React from "react";
import * as ReactDOM from 'react-dom';
import Dragula from 'react-dragula';

export class MultiPicklist extends React.Component {
    render() {
        return (<div className="swish-input-textarea">
                <div className='parent'>
                    <div className='wrapper'>
                        <div id='left-defaults' className='container' ref={dragulaDecorator} >
                            <div>Element 0</div>
                            <div>Element 1</div>
                            <div>Element 2</div>
                            <div>Element 3</div>
                    </div>
                        <div id='right-defaults' className='container'>
                            <div>Element a</div>
                            <div>Element b</div>
                            <div>Element c</div>
                            <div>Element d</div>
                            <div>Element e</div>
                        </div>
                    </div>
                </div>
                </div>);
    }

}  
const dragulaDecorator = (componentBackingInstance) => {
        if (componentBackingInstance) {
            let options = { };
            console.log('componentBackingInstance');
            console.log(componentBackingInstance);
            Dragula([componentBackingInstance]);
         }
};

您也可以在类方法中使用 ES6 箭头函数，但为此您需要在 Babel 中启用实验性功能才能使其编译。 查看此 SO 问题以获取更多详细信息：https://stackoverflow.com/a/31362350/4642844